Technology development of motorcycle have been fast in such a way. Motorcycle noise is an ever-increasingly important issue to be learned. Addressing noise in engine design is a complicated science and elusive art. There are many causes of noise and vibration in the engine. Noise is produced due to the mechanical vibrations that take place in the machine. It is important to evaluate how the different components of the structure influence the noise emissions of motorcycle.
This final project deals with the analysis and prediction of the acoustic noise emitted from vehicle machine rotating at 2000 rpm. A method for the prediction of the vehicle noise emissions has been proposed based on the use of mechanical finite element analysis by using ANSYS 8.0 software. Through the numerical modeling it can be depicted acoustical emissions of motorcycle in two dimension model.
Through this research it can be observed the form of sound pressure level distribution yielded by engine and entire mechanical component of vehicle at various frequency of 1667 Hz 3333 Hz 6667 Hz 100 Hz and 13333 Hz respectively. Pursuant to noise indication it can be perceived the existence of unbalance misalignment and mechanical loosen cases in every machine rotation.

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